Slug feed stop mechanism for collapsible tube presses



Oct. 19, 1937. 5 HElNZE ET AL 2,096,245

SLUG FEED STOP MECHANISM FOR COLLAPSIBLE TUBE PRESSES Filed Jan. 2, 19372 Sheets-Sheet l INVENTORS ERNST HE/NZE Mg? VIN cl. PAR/(E2 Oct. 19,1937. E. HEINZE ET AL SLUG FEED STOP MECHANISM FOR CULLAPSIBLE TUBEFRESSES Filed Jan. 2., 1937 2 Sheets-She et 2 2 5mm i M m Y wax. E 5 NWm 5 v Em o w wH. r l l J I aN A WNW 7 mam 5, M J/ 4 2 Z a 4 a IIIIPatented Oct. 19, 1937 UNITED STATES ATENT OFFECE.

SLUG FEED STOP MECHANISM FOR COL- LAPSIBLE TUBE PRESSES Ernst Heinze,Oceanside, Long Island, and Melvin 3. Parker, Brooklyn, N. Y.,.assignors to Victor Metal Products Corporation, Brooklyn, N. Y., acorporation'ofNew York Application January 2, 1937, Serial No. 118,730

9 Claims. (01. 2079) This invention relates to machines for ex- Fig.3 isa vertical section of the mechanism truding collapsible tubes from softmetal slugs, shown in Fig. 2, showing the trigger means in andparticularly, to the means for preventing the detail. further feeding ofslugs into the machine should Fig. 4 is a vertical section of thediaphragm u the blast of air customarily used for discharging valve forcontrolling the air pressure exerted on 5 the extruded tube from themachine fail to the trigger means. perform its function. In thepractical embodiment of our invention This invention is an improvementover the which we have illustrated by way of example, structure shown inthe prior application .of the frame l0 supports the various operatingin- George W. Temple for patent for Collapsible strumentalities,including the reciprocating cross tube extruding press, filed November30th, 1935, head H which carries the male die l2 and re- Serial No.52,294. ciprocates said die into and out of the female In said priorapplication, a stop is interposed die l3. Since the means forreciprocating the in the path of the slug feeding slide to prevent crosshead is well known as is the means for 35 the further feeding ofslugsshould the tube recarrying the male die l2 into a dischargeposimain on the plunger or male die instead ofbeing tion thereof,wherein the tube may be discharged blown off therefrom. While thestructure is adeor blown off the male die without interference quate forthis purpose, it falls to provide for the by other parts of :themachine, such mechanism independent testing of the blow off and otherneed not be described in detail, reference being operating means of themachine, but permits the made to said prior application for a full de-20 sometimes undesired feeding of slugs whenever scription of saidmeans. ,Suffice it to say that the machine is operated, even if only fortesting any suitable mechanism may be used to carry the purposes. lowerend of the male die I? into the compara- This invention thereforecontemplates the tively shallow female die 13, into which a slug g5provision of means for-maintaining the slug feedhas been fed by the slugfeeding mechanism ing means inoperative, after having been renfrom thehopper I4, and thereby to cause the dered inoperative by the failure ofthe machine slug to be extruded in the form of an elongated to dischargean extruded tube, and {until again tube l5 on the male die. Saidsuitable mechamade operative by the deliberate manual setting nism mayalso withdraw the male die with the thereof. tube thereon and oscillatethe male die, into a 30 This invention further contemplates theproposition for discharge of the tube [5 by a suitvision oftriggermea-ns, releasable automatically able air blast supplied throughthe pipe I6 and when the tube .is not blown off the plunger or throughthe male die in the customary manner. male die, to stop the feeding ofslugs regardless The slugs supplied .to the hopper I4 are piled of theoperation of the remainder of the machine, in horizontal position in theslug tube l8 and 35 said trigger means being manually settable into areremoved, one at a time from the bottom of position to permit slugs to befed to the extruding said tube, by .a suitable reciprocating feed slidepoint of the machine, when the machine is oper- IT. The spring l9connected at one end to a ated. projection of the feedslide and at itsother end ,to Our invention further contemplates the proa stationarypart of the machine, serves to opervision of means for normally,maintaining the ate the slide in its slug forwarding movement, pressureupon the trigger means substantially while the phaimZil connected at oneend to the constant regardless-of variations in the air presslide and atits other end to a moving part of sure in the mainsupply line. themachine, serves to retract the slide and to The various objects of theinvention will be extend the spring l9. Interposable in the path 45clear from 'the description which follows and of movement of the slideis the upright pin 2| from the drawings, in which, suitably supportedfor vertical reciprocation and Fig. 1 is a front elevation of :part ofan ,exurged upwardly by the spring 22 coiled theretruding-machine towhich our invention has been about. A suitable collar 23 near the upperend 59 applied. of the pin, limits the extent of the upward move- Fig..2 is :a top planview and partial horizontal ment of the pin, section of:the same showing particularly the slug- Means are provided for normallymaintaining feeding means and the means for preventing the pin 2| in itslowermost position and out of feeding -of the slugs when the tube is notblown the path of movement of the feed slide H, whereon" the male d-ie.by normal operation of the'machine may proceed .5

h.,- l 4 x a.

manner. Said means com- 25, and terminatingflin the trig " conical pincollar 2Q which is secured to the pin 1 35 into which'c'ornpressedfiuid' is {admitted'by means of the preferably flexible pipe 32.

- d thus maintains the pin in its lowermost do of the pivot '25 from theedge This a: anged the piston 35, operating in the cylinder 1 V 7 One"33 of said-pipe'is connected to the inlet 34 of the cylinder while theotheriend 35 of. the pipe is a connected to the T-con oection 36- of theV pipe The pipe ttco'mmunicat'es with the pipe |6 tween thepipes l Sfand l. V

To transmit movement of the piston trigger lever 24, a suitableplate ordisc as 42 may I be secured to the, under side of said trigger lever 'inposition to be engaged and raised by the upper endiof the piston, when'saidpiston is moved by' the excess air pressure admitted into thecylinder3l. .This occurs when the tube 8 is not blown ofi the plunger I2:by the air pressureadmitted through ,the pipe. |6.- In such. case, thecompressed air which would ordinarilyibe exhausted through the open endof the plunger I2 is instead u transmitted through the'pipe 38 andthence through the pipe 32to the cylinder 3| wherein it actsagainst thepiston 30. The piston thereupon is'rais'ed, raising theright-hand partof the trig ger lever. 24 and removing the trigger edge 21 from .thecollar 28.. The spring 22 is thereby freed to raise the pin 2| intothe'path'of the feed lever I1, thereby preventing feeding movement ofthe lever untilthe pin 2 Ihas beenmanually depressed and the triggeredge 2T again set on topof the collar I Inthe-position of the partsshown in Fig. 3,

operative movement of the feed lever having been mechanisms areconcerned-except the feed lever.

'When it has beenascertained that the machine operates properly, the pin2 Ifmay be re-set manually andiheld'by the trigger lever 2'! in itsinoperative position'wherein slug feeding; movement 7 of the feed leveris permitted. 1

It will be understood that asuitabIevaIve as 42 is operated at thepropertime to admit the compressed fluid at a predetermined pressure into thepipes Sand 38, as at the timer when'the tube isto be blown oiT theplunger. It will also be unj derstood that normally there maybeffluctuations r V s 1.' In a press for-extruding collapsible tubesfrom slugs, means for feeding slugs, into extrude 1 ing positionincluding afreciprocating feed plate,

in the'pr'essure of the air'admitted into the pipe 43 of the supplyline, In order that such-fluctuations may'not normally operate thepistonand release the trigger, the control valve 31, is provided,

said valve serving to maintain the normal pressure o nl the piston'3fl'at or below a predetermined minimum insufficient to operate said piston.

j Said valve maybe of any type designed for this' purpose but as shown,:(Fig, 4) in said valve is 7 provided an inlet chamber 45 communicatingwith the pipe 43 through the inlet 39.: The ax'ialoiien ing'46 in saidvalve c'ommun'icateswith the inlet chamber 45 and with the diaphragmchamber 41 lever 24, pivoted as a't25 to the ger edge 2i] Said edge.normally.

. rests upon the uppcr sur face '28 ofthe preferably againstactio'nofthe spring 22. On the the fluid supply pipe by'means' of 'A uniformpressure control valve 13? is arranged in the main air supply line beana the a in which is arranged thediaphragm48 held down T by theadjustablespring'49. Suitable passages as o 50, 5| communicate'with theopening 46 and with' the diaphragm chamber 41. A dischargepassage 52leads from the diaphragm chamber to'the valve outlet 60 leading to thepipe 44. Secured to the diaphragm 48 at one end and to the valve member53 at its other end, is the rod 54 adapted to reciprocate in the axialopening 46.

' It will be seen that compressed air entering the inlet chamber 48through the inlet opening 39 j, passes through the passages5|l and 5|and acts 'jy against.the, diaphragm 48-tending to'raise said.

diaphragm against the action of thespn'ng, .49.

when'permitted to do so, passes th'ro'ughthe pascloser'to the inlet endof the opening 46 and cutting down the volume of air enteringsaid open-'ing; In' this wayithe' volume of air passing into r the pipes 44,40,:"3,38; and 32and, into the piston cylinder is controlled and variationsin the pres- V i 1 surein the pipe 43 doesnot causematerial variationsin'the pressure on the piston, i V It will be seen that by the provisionof asepa rate'or independent stop pin 2|-for the feed lever, itbecomespossible to out ofithe feed of slugs into 7 n the dies while,operating the remainin'gparts of V the machine for testing and otherpurposes. i

It will also be seen that'so lo'ng as the pin 2 .is

4 in its raised or operative position, operation of the 'ma'chineinadvertently, does not cause the extru sion of' the tubes-on theplunger I2, thereby avoiding the .possibility of damaging theparts undercertain conditions.

When it isdesired' that the feed-stopping means be rendered inoperative,the pin 2| need merelybe pushed downwardly manually against the action'1he compressed air acting on the.jzliapl iragm,- 5

of the spring22 until the upper surface 28 of the j conicalmember .29passe's the bevelled trigger i engagement with the member 29, maintainsthe.

edge 21, whereafterthe trigger lever byfitsre pin2| in its inoperativeposition aided bythe ad- ,justableweight55 on the" trigger lever24. Saidweight is set to the proper positionon the trigger i lever and thereheld by the screw 56 operating in the lever slot 51, so that apredetermined amount of air'pressure only will raise the piston 30, and

When the air pressure is released, mere depression of the pin 2|asufiicient distance will reengage the triggerlever with the collar 29.1

specific "embodiments of our invention, We do not wish to be understoodas limiting ourselves thereto, but intend to claim our invention as ofthe appended claims.

.55 3 While we have shown' and described certain V a plunger forsuccessively extruding the slugs into I tubes at said position, airblast'means for dismountingthe extruded tube from the plunger,

and meansfor preventing feeding operation 01" the slug feedingmeansonthe failure of the airblast means'to dismount a'tiibe from thelun 7 er, comprising "aspring-pressed pin, .a, trigger V lever normallymaintaining said pin out'of the path of the feed plate, and atrigger-lever-releasing member responsive to the air blast means torelease said pin from the trigger lever for movement into the path ofthe feed plate while the tube is on the plunger, said pin being manuallyretractible out of the path of the feed plate into its inoperativeposition and. into engagement with the trigger lever.

2. In a slug feeding mechanism for collapsible tube extruding presses, afeed plate, a movable stop pin, a spring urging the pin into the path ofthe plate, and means for normally maintaining the pin out of said pathcomprising apivoted trigger-lever in removable operative engagement withthe pin, and an air pressure responsive member arranged to rotate thelever into its pinreleasing position when the air-pressure on the memberexceeds a predetermined amount.

3. A slug feed stop for collapsible tube extruding presses comprising amovable stop pin, a spring urging said pin into feed-stopping position,a trigger lever acting normally against the spring to maintain the pinout of feed-stopping position, and air pressure responsive means adaptedto move the lever out of its normal position to release the pinincluding an air-pressure control valve.

4. A slug feed stop for collapsible tube extruding presses comprising amovable stop pin, a spring urging said pin into its operative position,trigger means operatively connectable to and disengageable from the pinfor normally maintaining the pin in its inoperative position, andairpressure responsive means operatively connectable to the triggermeans to release the pin when the air-pressure thereon exceeds apredetermined amount.

5. In a slug feed stop for collapsible tube extruding presses, aspring-pressed stop pin, a conical collar on the pin, a trigger engagingsaid collar, and air pressure responsive means to disengage the triggerfrom the collar when the air pressure thereon rises above apredetermined amount.

6. In a slug feed stop for collapsible tube extruding presses, aspring-pressed stop pin, a releasable trigger normally maintaining thepin in its inoperative position, means for adjusting the releasingaction of the tri ger, and air-pressure responsive means for releasingthe trigger.

7. In a slug feed stop for collapsible tube extruding presses, aspring-pressed stopv pin, a re-- plunger, said. fluid pressureresponsive means including a trigger, a stop member releasable by thetrigger, and fluid pressure responsive means for releasing the triggerand means for controlling the fluid pressure on the fluid pressureresponsive means.

9. In a press for extruding collapsible tubes, a plunger, fluid-pressuremeans for dismounting an extruded tube from the plunger, movablemeansfor feeding slugs to the plunger, a spring-pressed pin interposablein the path of said movable means, a trigger normally maintaining saidpin inoperative, and fluid pressure responsive means for operating thetrigger to release the pin when an extruded tube remains on the plunger.

. ERNST HEINZE. MELVIN J. PARKER.

